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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 19-23 (21) days
cow estrus cycle
functions of progestrone
Avg. bull specs
Sperm survival specs
2. Milk ~305 days - dry 60 days prior to calving
vagina
Dairy Cattle milking schedule
Bull's fibro-elastic penis
effects of estrogen
3. 10-37 (21) days
hypothalamus and pituitary gland
mare estrus cycle
cow estrus cycle
mare estrus
4. Animals which have only one estrous cycle (ex: dog - fox)
things to check for in a breeding soundness exam (BSE)
monestrous
castration
4 major reasons for culling dairy cows
5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
Grading choice
ewe estrus
scrotum
organs used in spermatogenesis
6. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
Dairy calves are removed from cow at birth to...
penis sizes vs delivering methods
ewe estrus
estrus
7. Depository for semen during insemination. where urine leaves the body
vagina
why does the cow need fat deposits during pregnancy?
ewe estrus
visual evaluation (BSE)
8. Animals which have many estrous periods per year (ex: cow - sow)
#1 cost in production
rectal palpation (BSE)
effects of BST
polyestrous
9. Male on one pin and female on other side
monestrous
6-8 weeks
libido test (BSE)
ewe gestation
10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
vagina
Hard
sertoli cells
11. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
age and castration
cow estrus cycle
1. more cost effective - 2. powdered milk is in excess production
Follical Stimulating in males
12. (LH) stimulates the Leydig cells to produce testosterone
cow gestation
Bull's fibro-elastic penis
oviducts
Lutinizing Hormone in males
13. Days which have decreasing daylight hours
14. When are dairy cattle dehorned?
~1 month
cremaster muscle
scrotum
polyestrous
15. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
cow ovulation
Holstein Cow
Mares
dry matter and water
16. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
hormones
Where livelihood is in agriculture
things to check for in a breeding soundness exam (BSE)
behavioral signs of estrus
17. Actual heat cycle (period)
estrus
sertoli cells
penis and prepuce observation (BSE)
Parturition
18. Can survive ~7 days in cow. vast majority <48 hours
Sperm survival specs
Lutinizing Hormone in females
libido test (BSE)
scrotal circumference (BSE)
19. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
age and castration
growth lost from castration methods (knife & band)
cow gestation
seasonally polyestrous
20. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
cow estrus
mare estrus cycle
van deferens
monorchid
21. FEED
mare's estrous cycle
#1 cost in production
organs used in spermatogenesis
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
22. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
mare gestation
oviducts
Lutinizing Hormone in males
kidney stones also called ________ ___________ can develop in the sigmoid flexure
23. Microscopic - make sure not sterile - very few bulls are actually tested
estrous
Dairy Cattle Gestation
6-8 weeks
semen evaluation (BSE)
24. Milk is 15% ________ and 85% __________.
hypothalamus and pituitary gland
~1 month
Parturition
dry matter and water
25. 30 hours after estrus begins
epididymis: definition - 3 parts - 4 functions
seasonally polyestrous
reasons for castration
cow ovulation
26. Provide nourishment for the developing sperm
burdizzo
Lutinizing Hormone in males
Jersey Cow
sertoli cells
27. (LH) stimulates the Leydig cells to produce testosterone
Mares
Mares
cow gestation
Lutinizing Hormone in males
28. Birthing process (termination of gestation)
Parturition
castration
Lutinizing Hormone in males
cow estrus cycle
29. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
cryptorchid
cremaster muscle
Avg. bull specs
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
30. (male) pushes the testes outward toward the legs for a cool-down off of the body
urethra
colostrum
sperm cell
cremaster muscle
31. What makes the milk flow through the mammary glands?
prostaglandin
Blood
Where livelihood is in agriculture
Holstein Cow
32. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
Avg. bull specs
semen evaluation (BSE)
castration
Hard
33. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
prostate gland
epididymis: definition - 3 parts - 4 functions
purpose of Breeding Soundness Exam (BSE) for males
polyestrous
34. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
sow gestation
dry matter and water
Where livelihood is in agriculture
estrous
35. Luteolysis happens because of the ____________ hormone
prostaglandin
femininity of a heifer
cow estrus
van deferens
36. 336 days
libido test (BSE)
mare gestation
monestrous
kidney stones also called ________ ___________ can develop in the sigmoid flexure
37. 283 days
scrotum
dartos muscle
mastitis
cow gestation
38. 1-3 days
sow estrus
growth lost from castration methods (knife & band)
Follical Stimulating in males
4 major reasons for culling dairy cows
39. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
dry-off time in dairy cattle
ewe estrus
penis sizes vs delivering methods
penis proper
40. 1-3 days
Jersey Cow
growth lost from castration methods (knife & band)
organs used in spermatogenesis
sow estrus
41. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
polyestrous
vulva
1. more cost effective - 2. powdered milk is in excess production
42. Days which have decreasing daylight hours
43. Important 'landmark' during palpation
Culls bulls earlier (2 reasons)
functions of progestrone
cervix
sperm cell
44. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
scrotum
Reasons for gestation length being affected
kidney stones also called ________ ___________ can develop in the sigmoid flexure
1. more cost effective - 2. powdered milk is in excess production
45. (FSH) causes egg to mature in females
vagina
purpose of Breeding Soundness Exam (BSE) for males
Follical Stimulating in females
Lutinizing Hormone in males
46. When are dairy cattle dehorned?
Where livelihood is in agriculture
behavioral signs of estrus
mare estrus
~1 month
47. Way to know everything is alright with the breeding male
eminal vesicles
cremaster muscle
purpose of Breeding Soundness Exam (BSE) for males
hormones
48. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
Size of cow in relation to the amount of milk produced
Follical Stimulating in females
seasonally polyestrous
49. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
epididymis: definition - 3 parts - 4 functions
butterfat
normal presentation of the fetus
estrous
50. 265-285 days
1. more cost effective - 2. powdered milk is in excess production
stag
Dairy Cattle Gestation
penis proper